arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.11265quant-phcond-mat.stat-mech
收藏

利用量子开关从相干激活映射中提取功

Work extraction from coherently activated maps via quantum switch

Kyrylo Simonov, Gianluca Francica, Giacomo Guarnieri, Mauro Paternostro

备注：
13 pages, 2 figures
发表信息：
Phys. Rev. A 105, 032217 (2022)
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

我们的特点的影响，在量子控制的顺序上的工作提取的过程中，通过酉循环及其优化的应用程序的两个地图。该控制基于量子开关模型，该模型以不一定与底层因果结构兼容的顺序应用映射，并且原则上可以通过实验实现。首先，我们表明，通过量子开关模型激活量子映射总是需要一个非负增益遍历相比，他们连续的应用程序。我们还建立了一个条件，地图应该满足，以实现非零各向异性增益。然后，我们进行了彻底的分析应用到一个两级系统的地图，并提供了一般条件，实现了积极的增益各向同性的不相干的一部分。我们的结果说明了几个例子，并应用到量子比特和$d$维量子系统。特别是，我们证明了一个非零的工作，可以从系统热化两个相干控制水库。

英文摘要：

We characterize the impact that the application of two maps in a quantum-controlled order has on the process of work extraction via unitary cycles and its optimization. The control is based on the quantum switch model that applies maps in an order not necessarily compatible with the underlying causal structure and, in principle, can be implemented experimentally. First, we show that the activation of quantum maps through the quantum switch model always entails a non-negative gain in ergotropy compared to their consecutive application. We also establish a condition that the maps should fulfill in order to achieve a non-zero ergotropic gain. We then perform a thorough analysis of maps applied to a two-level system and provide general conditions for achieving a positive gain on the incoherent part of ergotropy. Our results are illustrated with several examples and applied to qubit and $d$-dimensional quantum systems. In particular, we demonstrate that a non-zero work can be extracted from a system thermalized by two coherently controlled reservoirs.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑